I'm pretty ticked about it to tell you then truth. I got sold a defective unit and have to keep it
It may not be a defective unit...it really depends upon customer expectation and what your previous sander experiences have been.
I remember recently, a person voiced his/her displeasure with a Pro 5 and they took it back to their local Woodcraft store. The owner of the sander stated it was terrible, one of the Woodcraft employees said it needed to be carefully guided and the other Woodcraft employee said it was normal. So who's right?
I have a Pro 5 and it does have a mind of its own from time to time but it still is a pleasurable sander to use. It all depends upon the direction of the grain of the wood, the direction that the sander is going at the time, the grit of the paper, the orbital speed of the sander, the amount of suction on the vacuum, and the amount of pressure that the operator is applying to the sander.
Bottom line...if you're within the 30 day window, just return it for a full reimbursement.
Then again, you can always sell it on eBay and pay for the first year of your child's education...